ENHANCEMENT DEVICE FOR A WIRELESS ANTENNA

Description

[0001] The invention relates to an enhancement device for a wireless antenna, wherein the wireless antenna serves for transmitting and receiving wireless signals for wireless data transmission, wherein the wireless signals comprise a first transmission protocol and a first transmission frequency.

[0002] In industrial settings wireless communication is of growing importance. The application of wireless communication has led to a increased diversity and increased rate of development of wireless solutions. In particular, standards and communication protocols are continually changing and developing. This high rate of change presents a challenge in process automation and control technology because the installed basis of field devices, which are installed to monitor and control processes, must continually be updated and/or replaced in order to conform to the lastest developments in wireless communication technology.

[0003] In automation technology, especially in process automation technology, field devices serving to register and/or influence process variables are often applied. For registering process variables, sensors, which are integrated, for example, in fill level measuring devices, flow measuring devices, pressure and temperature measuring devices, pH and redox potential measuring devices, conductivity measuring devices, etc., serve to register the corresponding process variables fill level, flow, pressure, temperature, pH value, or conductivity. Actuators serve for influencing process variables; such actuators can be, for example, valves or pumps, via which the flow of a liquid in a pipeline section or the fill level in a container can be changed. In principle, all devices, which are applied near to the process and deliver, or process, process relevant information, are referred to as field devices. In connection with the invention, remote I/Os, wireless adapters, or, generally, electronic components, which are arranged on the field level, are understood to be field devices. Many such field devices are available from the Endress+Hauser group of companies.

[0004] For various reasons, completely replacing or updating the hardware and/or software of an installed basis of field devices is not always possible and generally involves a large cost.

[0005] In the US Patent US 6,937,615 B1, a solution is presented in which a so-called dual stack system is described. Here, a dual purpose bridge for wireless communication allows both a low frequency wireless communication standard and a high frequency communication standard to operate for a particular wireless communications device. However, this solution also requires the development and implementation of additional hardware depending on the application and reduces power consumption only by using the low frequency and less complex standard with a lower bit rate. In the US patent US 2011/0216695 A1 an apparatus for bridging a barrier to wireless communication between wireless field device networks includes a pair of locally-powered wireless devices connected by a wired link spanning the barrier.

[0006] The object of the invention is to provide a simple and cost effective way of retrofitting a wireless capable device in order to increase the devices ability to wirelessly transmit and/or receive data.

[0007] The object of the invention is achieved with an enhancement device for a wireless antenna, wherein the wireless antenna serves for transmitting and receiving wireless signals for wireless data transmission, wherein the wireless signals comprise a first transmission protocol and a first transmission frequency, wherein a connecting element is provided, which connects the enhancement device to the wireless antenna, wherein a first transmitting-/receiving unit is provided, which serves to receive transmission wireless signals from the wireless antenna, wherein a converter is provided which is embodied to convert the transmission wireless signals from the wireless antenna into a second transmission protocol and/or into a second transmission frequency, wherein a second transmitting-/receiving unit is provided, which serves to transmit the converted transmission wireless signals, and wherein a circuit is provided, which is embodied to harvest energy from the received transmission wireless signals. In this way, a field device with a wireless antenna can be modified in a simple and economic way with an enhancement device for a wireless antenna that can convert a transmission/reception protocol of a transmission/reception signal into another transmission/reception protocol and/or a transmission/reception signal frequency into another transmission/reception signal frequency. It is particularly beneficial that the enhancement device can harvest energy from the wireless antenna itself so as to preserve the advantages that wireless communication offers such as flexibility, mobility and reduced cost for wiring.

[0008] The object of the invention is likewise achieved with an enhancement device for a wireless antenna, wherein the wireless antenna serves for transmitting and receiving wireless signals for wireless data transmission, wherein the wireless signals comprise a first transmission protocol and a first transmission frequency, wherein a connecting element is provided, which connects the enhancement device to the wireless antenna, wherein a second transmitting-/receiving unit is provided, which serves to receive reception wireless signals, wherein the reception wireless signals comprise a second transmission protocol and/or a second transmission frequency, wherein a converter is provided which is embodied to convert the reception wireless signals into a first transmission protocol and/or into a first transmission frequency, wherein a first transmitting-/receiving unit is provided, which serves to transmit the converted reception wireless signals, and wherein a circuit is provided, which is embodied to harvest energy from the received reception signals. In this way, a field device with a wireless antenna can be modified in a simple and economic way with an enhancement device for a wireless antenna that can convert a transmission/reception protocol of a transmission/reception signal into another transmission/reception protocol and/or a transmission/reception signal frequency into another transmission/reception signal frequency. It is particularly beneficial that the enhancement device can harvest energy from the wireless antenna itself so as to preserve the advantages that wireless communication offers such as flexibility, mobility and reduced cost for wiring.

[0009] In an advantageous embodiment of the invention, the converter comprises a processing unit, which serves to convert the first transmission protocol into the second transmission protocol and/or to convert the second transmission protocol into the first transmission protocol. In its simplest form, the enhancement device is embodied simply as an electrical converter for the conversion from one frequency to another frequency, but the addition of a processing unit enables the converter to translate from one protocol to another.

[0010] In an advantageous embodiment of the enhancement device, the circuit is connected to the first transmitting-/receiving unit and/or second transmitting-/receiving unit and serves to digitalise information contained in received wireless signals as well as to convert energy contained in received wireless signals into a useable form, in particular into direct current. Energy can be harvested from wireless signals by rectifying an alternating current generated by the signals, for example through the use of diodes, and in particular shottky diodes.

[0011] In a further development, an power management unit is provided in the enhancement device, which serves to store the energy harvested from the wireless signals and to distribute the energy to components of the enhancement device.

[0012] In a further development of the inventive enhancement device the connection element is a locking ring. A locking ring represents a simple way of attaching and/or detaching said enhancement device to/from the antenna.

[0013] In an advantageous embodiment of the invention, the enhancement device comprises an additional source of energy.

[0014] In a further development of the advantageous embodiment, the additional source of energy in the enhancement device is a battery, and the battery is arranged in the power management unit.

[0015] In an advantageous embodiment of the invention, the enhancement device comprises components that serve to harvest energy from the enhancement device s surroundings, in particular by using photoelectric, thermoelectric and/or piezoelectric effects.

[0016] In another advantageous embodiment of the inventive enhancement device, an encryption logic is provided in the processor unit, which serves to encrypt and/or decrypt received wireless signals.

[0017] A further development of the invention involves the application of the enhancement device in connection with a wireless capable field device in automation technology.

[0018] Another development of the inventive enhancement device involves the application of the enhancement device for establishing an alternative communication pathway between at least two wireless capable field devices in automation technology, wherein the communication pathway serves for the transmission of security relevant data. As an example, two such enhancement devices could be attached to two field devices respectively and thereby enable the exchange of data over a so called side channel. If administrative access to field device software is restricted to data transmission over a enhancement device specific protocol -with an encryption function, for example- and/or frequency band, then an extra layer of security can be applied. Subsequent removal of the enhancement devices would then provide an added barrier to device manipulation.

[0019] The invention will next be more closely described with reference to the following figures. The show:

Fig. 1: a block diagram of the circuitry of an exemplary field device with a wireless antenna and an exemplary enhancement device;

Fig. 2: a cross-section of an exemplary enhancement device;

Fig. 3: a block diagram of the circuitry of an exemplary enhancement device.

[0020] Fig. 1 shows a block diagram of the circuitry of an exemplary field device 11 with a wireless antenna 2 and an exemplary enhancement device 1. The field device 2 in this case is a measurement device having a sensor 12 for registering and/or monitoring a process parameter or variable. The sensor 12 is connected to an I/O module 13 which inputs data generated by the sensor into a microprocessor 14. The microprocessor 14 is capable of running various software programs in order to process the data from the sensor 12, for example. The microprocessor 14 also prepares data for transmission to other field devices such as a gateway or another control unit, for example. The transmission of data in a wireless network is enacted by means of a medium access unit 15 and a high frequency unit 16 for generating transmission signals. The transmission signals are traditionally coupled onto a wireless antenna 2 and thereby transmitted in the form of electromagnetic radiation in a predetermined frequency band. Wireless antennas used in process and automation technology as well as in a wide variety of other applications typically comprise a length that is on the order of a quarter wavelength of the signal that is to be transmitted. In Fig. 1 the antenna 2 shown is of this sort. An enhancement device 1 is shown next to the antenna 2, which is embodied so that it the antenna 2 can be inserted into it. In this case, the enhancement device 1 encompasses the wireless antenna 2 as a kind of sheath. The enhancement device 1 can be attached to the antenna 2 by means of a locking ring 3, for example. In this case, the locking ring 3 can be attached to the antenna 2, and the enhancement device 1 can be attached to the locking ring 3.

[0021] Fig. 2 shows a cross-section of an exemplary enhancement device 1, such as the one shown in Fig. 1. The enhancement device 1 comprises an outer housing 17 and an inner hollow area 18 that is large enough to accept a wireless antenna 2 of a field device 11. The hollow area 18 is bounded by a first transmitting-/receiving element 4a for receiving signals from the antenna 2 and transmitting signals to the antenna 2. This first transmitting-/receiving element 4a is connected to an electronics unit 7 of the enhancement device 1. The electronics unit 7 of the enhancement device 1 processes the data received from the wireless antenna 2 and/or processes data that is to be transmitted to the wireless antenna 2 as will be explained in connection with Fig. 3. The electronics unit 7 of the enhancement device 1 is further connected to a second transmitting-/receiving element 6a. The second transmitting-/receiving element 6a serves to transmit signals to, and/or receive signals from, other field devices, for example.

[0022] In Fig. 2 a shielding material 19 is provided to prevent electromagnetic signals from the wireless antenna 2 from being transmitted beyond the enhancement device 1. For example, a conducting layer, such as sheet metal or even wire mesh forming a faraday cage, can be inserted and electrically grounded. This shielding material 19 can optionally be omitted in order to enable the field device 11 to communicate on dual frequency bands, or using various communication protocols. This can be especially beneficial for certain security applications that require multiple communication pathways, or for the purpose of redundancy.

[0023] In Fig. 3 a block diagram of the circuitry of an exemplary enhancement device 1 is shown. A first high frequency unit 4b is shown, which together with the first transmitting-/receiving element 4a forms a first transmitting-/receiving unit 4. The first high frequency unit 4 feeds data at a first frequency and with a first protocol to a converter 5. At the same time, energy from signals received by the first transmitting-/receiving unit 4 is fed to a power management unit 9. Methods and electrical components for extracting energy from electromagnetic signals are known in the art, for example in the US Patent US 5043739 A and the international publication WO2013141951 A1. The power management unit 9 stores and redistributes energy to the various other components of the enhancement device 1 such as the first and second high frequency units 4b, 6b and the converter 5. The power management unit 9 can also comprise an alternative energy source 10 such as a battery 10, for example.

[0024] As noted above, a second high frequency unit 6b is provided, which together with a second transmitting-/receiving element 6a forms a second transmitting-/receiving unit 6. This second transmitting-/receiving unit 6 serves to transmit converted signals, which comprise a second frequency and/or protocol, to other field devices, for example, and/or to receive signals from other field devices, for example. Analogous to the first transmitting-/receiving unit 4 energy from signals received by the second transmitting-/receiving unit 6 is also harvested and fed to the power management unit 9. Due to the difference in the density of the electromagnetic radiation from other field devices in comparison to that transmitted by the wireless antenna 2, it can be assumed that the majority of the harvested energy is harvested from wireless antenna 2. Advantageously, the enhancement device 1 can harvest enough energy to meet up to half of its energy requirements from the electromagnetic radiation collected by the first and second transmitting-/receiving units 4, 6. Very advantageously, the enhancement device 1 can harvest enough energy to meet up to seventy procent of its energy requirements from the electromagnetic radiation collected by the first and second transmitting-/receiving units 4, 6.

[0025] The converter 5 serves to receive data from the first and/or second transmitting-/receiving unit 4, 6 and processes the data in one of serveral ways. This conversion, in a simple embodiment, comprises a purely electrical conversion from one frequency band to another frequency band. This enables a field device 11 that is equipped to communicate wirelessly on a frequency band that is outdated or that is incompatible with other wireless devices to communicate on a different frequency band. A purely electrical conversion of this sort can be preset or can be adjustable, wherein the enhancement device 1 comprises a tuning function. The conversion, in other embodiments, can also involve a change of protocol through the application of translation logic in a processor 8 in the converter 5. This function can serve to integrate old and new devices or even serve as a means to integrate third party wireless capable devices.

List of Reference Characters

[0026] 

1

Enhancement device

2

Antenna

3

connection element/ locking ring

4

first transmitting-/receiving unit

4a

first transmitting-/receiving element

4b

first high frequency unit

5

converter

6

second transmitting-/receiving unit

6a

second transmitting-/receiving element

6b

second high frequency unit

7

circuit

8

processing unit of the converter

9

power management unit

10

additional energy source/ battery

11

field device/ measuring device

12

sensor

13

I/O module

14

processing unit of the field device

15

medium access unit

16

high frequency unit of the field device

17

outer housing of the enhancement device

18

hollow area of the enhancement device

19

shielding material

Claims

1. Enhancement device (1) for a wireless antenna (2), wherein the wireless antenna (2) serves for transmitting and receiving wireless signals for wireless data transmission, wherein the wireless signals comprise a first transmission protocol and a first transmission frequency, the enhancement device comprising a connecting element (3) adapted to connect the enhancement device (1) to the wireless antenna (2),
a first transmitting-/receiving unit (4) adapted to receive transmission wireless signals from the wireless antenna (2), a converter (5) adapted to convert the transmission wireless signals from the wireless antenna (2) into a second transmission protocol and/or into a second transmission frequency,
a second transmitting-/receiving unit (6) adapted to transmit the converted transmission wireless signals, and
a circuit (7) adapted to harvest energy from the received transmission wireless signals,
wherein the enhancement device (1) is embodied so that the wireless antenna (2) can be inserted into it such that it encompasses the wireless antenna as a kind of sheath.

2. Enhancement device (1) for a wireless antenna (2), wherein the wireless antenna (2) serves for transmitting and receiving wireless signals for wireless data transmission, wherein the wireless signals comprise a first transmission protocol and a first transmission frequency, the enhancement device comprising a connecting element (3) adapted to connect the enhancement device (1) to the wireless antenna (2),
a second transmitting-/receiving unit (6) adapted to receive reception wireless signals, wherein the reception wireless signals comprise a second transmission protocol and/or a second transmission frequency,
a converter (5) adapted to convert the reception wireless signals into a first transmission protocol and/or into a first transmission frequency,
a first transmitting-/receiving unit (4) adapted to transmit the converted reception wireless signals, and
a circuit (7) adapted to harvest energy from the received reception signals,
wherein the enhancement device (1) is embodied so that the wireless antenna (2) can be inserted into it such that it encompasses the wireless antenna as a kind of sheath.

3. Enhancement device (1) according to claim 1 or 2,
characterised in that,
the converter (5) comprises a processing unit (8), which serves to convert the first transmission protocol into the second transmission protocol and/or to convert the second transmission protocol into the first transmission protocol.

4. Enhancement device (1) according to at least one of the preceding claims,
characterised in that the circuit (7) is connected to the first transmitting-/receiving unit (4) and/or second transmitting-/receiving unit (6) and serves to digitalise information contained in received wireless signals as well as to convert energy contained in received wireless signals into a useable form, in particular into direct current.

5. Enhancement device (1) according to at least one of the preceding claims,
characterised in that a power management unit (9) is provided, which serves to store the energy harvested from the wireless signals and to distribute the energy to components of the enhancement device (1).

6. Enhancement device (1) according to at least one of the preceding claims,
characterised in that the connection element (3) is a locking ring (3).

7. Enhancement device (1) according to at least one of the preceding claims,
characterised in that the enhancement device (1) comprises an additional source (10) of energy.

8. Enhancement device (1) according to at least one of the preceding claims,
characterised in that the additional source (10) of energy is a battery (10), and that the battery (10) is arranged in the power management unit (9).

9. Enhancement device (1) according to at least one of the preceding claims,
characterised in that the enhancement device (1) comprises components that serve to harvest energy from the enhancement device's surroundings, in particular by using photoelectric, thermoelectric and/or piezoelectric effects

10. Enhancement device (1) according to at least one of the preceding claims,
characterised in that encryption logic is provided in the processor unit (8), which serves to encrypt and/or decrypt received wireless signals.

11. Application of the enhancement device (1) according to at least one of the preceding claims in connection with a wireless capable field device (11) in automation technology.

12. Application of the enhancement device (1) according to at least one of the claims 1 to 10 for establishing an alternative communication pathway between at least two wireless capable field devices (11) in automation technology, wherein the communication pathway serves for the transmission of security relevant data.

Ansprüche

1. Verstärkungsgerät (1) für eine drahtlose Antenne (2), wobei die drahtlose Antenne (2) zum Senden und Empfangen von drahtlosen Signalen zur drahtlosen Datenübertragung dient, wobei die drahtlosen Signale ein erstes Übertragungsprotokoll und eine erste Übertragungsfrequenz umfassen und
das Verstärkungsgerät
ein Anschlusselement (3), das zum Anschluss des Verstärkungsgeräts (1) an der drahtlosen Antenne (2) geeignet ist,
eine erste Sende-/Empfangseinheit (4), die für den Empfang drahtloser Übertragungssignale von der drahtlosen Antenne (2) geeignet ist,
einen Umformer (5), der für die Umformung der drahtlosen Übertragungssignale von der drahtlosen Antenne (2) in ein zweites Übertragungsprotokoll und/oder in eine zweite Übertragungsfrequenz geeignet ist,
eine zweite Sende-/Empfangseinheit (6), die für die Übertragung der umgeformten drahtlosen Übertragungssignale geeignet ist,
und einen Kreis, der zur Energiegewinnung aus den empfangenen drahtlosen Übertragungssignalen geeignet ist, umfasst,
wobei das Verstärkungsgerät (1) dergestalt ausgebildet ist, dass die drahtlose Antenne (2) darin eingeführt werden kann, so dass es die drahtlose Antenne wie eine Art Hülle umgibt.

2. Verstärkungsgerät (1) für eine drahtlose Antenne (2), wobei die drahtlose Antenne (2) zum Senden und Empfangen drahtloser Signale für eine drahtlose Datenübertragung dient, wobei die drahtlosen Signale ein erstes Übertragungsprotokoll und eine erste Übertragungsfrequenz umfassen und
das Verstärkungsgerät ein Anschlusselement (3), das zum Anschluss des Verstärkungsgeräts (1) an der drahtlosen Antenne (2) geeignet ist,
eine zweite Sende-/Empfangseinheit (6), die zum Empfang drahtloser Empfangssignale geeignet ist, wobei die drahtlosen Empfangssignale ein zweites Übertagungsprotokoll und/oder eine zweite Übertragungsfrequenz umfassen,
einen Umformer (5), der zur Umformung der drahtlosen Empfangssignale in ein erstes Übertragungsprotokoll und/oder in eine erste Übertragungsfrequenz geeignet ist,
eine erste Sende-/Empfangseinheit (4), die für die Übertragung der umgeformten drahtlosen Empfangssignale geeignet ist,
und einen Kreis (7), der zur Energiegewinnung aus den empfangenen Empfangssignalen geeignet ist, umfasst,
wobei das Verstärkungsgerät (1) dergestalt ausgebildet ist, dass die drahtlose Antenne (2) darin eingeführt werden kann, so dass es die drahtlose Antenne wie eine Art von Hülle umgibt.

3. Verstärkungsgerät (1) nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
der Umformer (5) eine Prozesseinheit (8) umfasst, die zur Umformung des ersten Übertragungsprotokolls in das zweite Übertragungsprotokoll und/oder zur Umformung des zweiten Übertragungsprotokolls in das erste Übertragungsprotokoll dient.

4. Verstärkungsgerät (1) nach mindestens einem der vorhergehenden Anspräche,
gekennzeichnet dadurch, dass der Kreis (7) an der ersten Sende-/Empfangseinheit (4) und/oder an der zweiten Sende-/Empfangseinheit (6) angeschlossen ist und zur Digitalisierung der in den empfangenen drahtlosen Signalen enthaltenen Informationen sowie zur Umformung der in den empfangenen drahtlosen Signalen enthaltenen Energie in eine verwertbare Form, insbesondere in Gleichstrom, dient.

5. Verstärkungsgerät (1) nach mindestens einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass eine Leistungsüberwachungseinheit (9) vorhanden ist, die zur Speicherung der aus den drahtlosen Signalen gewonnenen Energie und zur Verteilung der Energie an Komponenten des Verstärkungsgeräts (1) dient.

6. Verstärkungsgerät (1) nach mindestens einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Anschlusselement (3) ein Sicherungsring (3) ist.

7. Verstärkungsgerät (1) nach mindestens einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Verstärkungsgerät (1) eine zusätzliche Energiequelle (10) umfasst.

8. Verstärkungsgerät (1) nach mindestens einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die zusätzliche Energiequelle (10) eine Batterie (10) ist und dass die Batterie (10) in der Leistungsüberwachungseinheit (9) angeordnet ist.

9. Verstärkungsgerät (1) nach mindestens einem der vorhergehenden Ansprüche,

dadurch gekennzeichnet, dass das Verstärkungsgerät (1) Komponenten umfasst, die zur Energiegewinnung aus der Umgebung des Verstärkungsgeräts, insbesondere durch Verwendung fotoelektrischer, thermoelektrischer und/oder piezoelektrischer Effekte, dienen.

10. Verstärkungsgerät (1) nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Verschlüsselungslogik in der Prozesseinheit (8) vorhanden ist, die zur Verschlüsselung und/oder Entschlüsselung der empfangenen drahtlosen Daten dient.

11. Anwendung des Verstärkungsgeräts (1) nach mindestens einem der vorhergehenden Ansprüche in Verbindung mit einem drahtlosfähigen Feldgerät (11) in der Automatisierungstechnik.

12. Anwendung des Verstärkungsgeräts (1) nach mindestens einem der Ansprüche 1 bis 10 zur Einrichtung eines alternativen Kommunikationspfads zwischen mindestens zwei drahtlosfähigen Feldgeräten (11) in der Automatisierungstechnik, wobei der Kommunikationspfad zur Übertragung sicherheitsrelevanter Daten dient.

Revendications

1. Dispositif d'amélioration (1) pour une antenne sans fil (2), l'antenne sans fil (2) servant pour l'émission et la réception de signaux sans fil pour la transmission de données sans fil, les signaux sans fil comprenant un premier protocole de transmission et une première fréquence de transmission,
le dispositif d'amélioration comprenant
un élément de connexion (3) adapté pour connecter le dispositif d'amélioration (1) à l'antenne sans fil (2),
une première unité d'émission/réception (4) adaptée pour recevoir les signaux de transmission sans fil provenant de l'antenne sans fil (2),
un convertisseur (5) adapté pour convertir les signaux de transmission sans fil provenant de l'antenne sans fil (2) dans un deuxième protocole de transmission et/ou dans une deuxième fréquence de transmission,
une deuxième unité d'émission/réception (6) adaptée pour transmettre les signaux de transmission sans fil convertis, et
un circuit (7) adapté pour capturer l'énergie provenant des signaux de transmission sans fil reçus,
le dispositif d'amélioration (1) étant conçu afin que l'antenne sans fil (2) puisse y être introduite, de telle manière à ce qu'il entoure l'antenne sans fil comme une sorte d'enveloppe.

2. Dispositif d'amélioration (1) pour une antenne sans fil (2), l'antenne sans fil (2) servant pour l'émission et la réception de signaux sans fil pour la transmission de données sans fil, les signaux sans fil comprenant un premier protocole de transmission et une première fréquence de transmission,
le dispositif d'amélioration comprenant
un élément de connexion (3) adapté pour connecter le dispositif d'amélioration (1) à l'antenne sans fil (2),
une deuxième unité d'émission/réception (6) adaptée pour recevoir les signaux de transmission sans fil, les signaux de réception sans fil comprenant un deuxième protocole de transmission et/ou une deuxième fréquence de transmission,
un convertisseur (5) adapté pour convertir les signaux de réception sans fil dans un premier protocole de transmission et/ou dans une première fréquence de transmission,
une première unité d'émission/réception (4) adaptée pour transmettre les signaux de réception sans fil convertis, et
un circuit (7) adapté pour capturer l'énergie provenant des signaux de réception sans fil reçus,
le dispositif d'amélioration (1) étant conçu afin que l'antenne sans fil (2) puisse y être introduite, de telle manière à ce qu'il entoure l'antenne sans fil comme une sorte d'enveloppe.

3. Dispositif d'amélioration (1) selon la revendication 1 ou 2,
caractérisé
en ce que le convertisseur (5) comprend une unité de traitement (8), qui sert à convertir le premier protocole de transmission dans le deuxième protocole de transmission et/ou à convertir le deuxième protocole de transmission dans le premier protocole de transmission.

4. Dispositif d'amélioration (1) selon au moins l'une des revendications précédentes,
caractérisé
en ce que le circuit (7) est connecté à la première unité d'émission/réception (4) et/ou à la deuxième unité d'émission/réception (6), et sert à numériser les informations contenues dans les signaux sans fil reçus ainsi qu'à convertir l'énergie contenue dans les signaux sans fil reçus dans une forme utilisable, notamment en courant continu.

5. Dispositif d'amélioration (1) selon au moins l'une des revendications précédentes,
caractérisé
en ce qu'est fournie une unité de gestion d'énergie (9), qui sert à stocker l'énergie capturée à partir des signaux sans fil et à distribuer l'énergie aux composants du dispositif d'amélioration (1).

6. Dispositif d'amélioration (1) selon au moins l'une des revendications précédentes,
caractérisé
en ce que l'élément de connexion (3) est un anneau de verrouillage (3).

7. Dispositif d'amélioration (1) selon au moins l'une des revendications précédentes,
caractérisé
en ce que le dispositif d'amélioration (1) comprend une source d'énergie (10) additionnelle.

8. Dispositif d'amélioration (1) selon au moins l'une des revendications précédentes,
caractérisé
en ce que la source d'énergie (10) additionnelle est une batterie (10), et en ce que la batterie (10) est disposée dans l'unité de gestion d'énergie (9).

9. Dispositif d'amélioration (1) selon au moins l'une des revendications précédentes,
caractérisé
en ce que le dispositif d'amélioration (1) comprend des composants servant à capturer l'énergie issue de l'environnement du dispositif d'amélioration, notamment en utilisant les effets photoélectriques, thermoélectriques et/ou piézoélectriques.

10. Dispositif d'amélioration (1) selon au moins l'une des revendications précédentes,
caractérisé
en ce qu'est prévue, dans l'unité de traitement (8), une logique de cryptage servant à crypter et/ou à décrypter les signaux sans fil reçus.

11. Application du dispositif d'amélioration (1) selon au moins l'une des revendications précédentes en combinaison avec un appareil de terrain (11) compatible sans fil de la technique d'automatisation.

12. Application du dispositif d'amélioration (1) selon au moins l'une des revendications 1 à 10 pour l'établissement d'une voie de communication alternative entre au moins deux appareils de terrain (11) compatibles sans fil de la technique d'automatisation, la voie de communication servant à la transmission de données de sécurité.

Drawing